Services or capabilities described in AWS documentation might vary by Region. To see the differences applicable to the AWS European Sovereign Cloud Region, see the AWS European Sovereign Cloud User Guide.Failover to the secondary AWS Region
We recommend that you monitor replication latency in the secondary AWS Region using Amazon CloudWatch. During a service event in the primary AWS Region, replication latency may suddenly increase. If the latency keeps increasing, use the AWS Service Health Dashboard to check for service events in the primary AWS Region. If there is a service event, you can failover to the secondary AWS Region.